Series is formed by sequential multiplication by 2, 3, 4, 5, ... and subtraction of 3, 8, 13, 18, ....
5 x 2 - 3 = 7
7 x 3 - 8 = 13
13 x 4 - 13 = 39
39 x 5 - 18 = 177
177 x 6 - 23 = 1039
Correct Option 4)
The person who can solve mathematical problems,can lead life easily ,Maths tellu that every problem as solution...we can find number of solutions for one problem ...Aplly it in the life also we can lead our life happily...
swetha
My maths book suicided because it had lots of problems in it ......